Crossword Genius

Paleozoic and Mesozoic

Ross

I believe the answer is:

eras

'paleozoic and mesozoic' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for eras that I've seen before include "At least two times" , "Epochs" , "Periods, ages" , "typeface" , "Periods of time" .)

I've seen this clue in The New York Times.
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